Wheeled dumping-scraper.



No. 784,572. PATENTED MAR. 14, 1905.

J. O. E. KROHN. WHEELED DUMPING SGRAPER.

APPLICATION FILED DEC. 17. 1904.

2 SHEETS-SHEET 1.

No. 784,572. PATENTED MAR. 14, 1905.

- J. 0. E. KROHN.

WHEELED DUMPING SGRAPER.

APPLICATION FILED DEO.17, 1904.

2 SHEETS-SHEET 2.

NITED STATES Patented March 14, 1905 PATENT OFFICE.

JOHN O. E. KROHN, OF BARBERTON, OHIO, ASSIGNOR TO NATIONAL DRILL & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A OORPORA TION OF EST VIRGINIA.

WHEELED DUMPING-SCRAPER.

SPECIFICATION forming part of Letters Patent No. 784,572, dated March 14, 1905.

Application filed December 17, 1904. Serial No. 237,317.

To all whom it may concern.-

Be it known that I, JOHN O. E. KRoHN, a citizen of the United States, residing at Barberton, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in l/Vheeled Dumping- Scrapers, of which the following is a specification.

My invention relates to wheeled dumpingscrapers of the class in which the scoop or bowl is connected with a crank-axle and the latter operated by a lever for the purpose of lowering the bowl into position to take the earth and in alternation therewith raising the bowl into carrying position, the bowl being provided upon its rear end with a catch and the lever being provided with a latch, which engages the catch on the bowl when the latter is raised into carrying position.

Objects of my invention are to provide a wheeled dumping-scraper of the class referred to with an exceedingly simple spring device for causing the latch to engage the catch on the bowl, to avoid the undesirable feature of attaching the ends of the spring to supports or bearings therefor, to arrange the spring out of the way, and to avoid projections above the lever at a point where the latch is attached thereto, and thereby avoid liability of accidental breakage or disarrangement when the bowl is dumped or turned upside down, so as to discharge the load.

In the accompanying drawings, Figure 1 represents, mainly in side elevation, a wheeled dumping-scraper with my improved latch device applied thereto, the near wheel and substantially one-half of the axle being removed by taking a section transversely through the middle high portion of such axle and one of the bail-arms being partially broken away, so as to show a portion of the inner side of the opposite bailarm. Fig. 2 is a detail illustrating a section on line 2 2 in Fig. 4, the latch device being shown in elevation. Fig. 3 is a detail illustrating a section on line 3 3 in Fig. 2. Fig. 4 is a top plan view of a part of the rear portion of Fig. 2, parts of the bowl and lever being broken away. Fig. 5 is a view similar to Fig. 1, the scoop or bowl in Fig. 1 being shown in carrying position,while in Fig. 5 it is lowered for the purpose of scraping up earth.

A indicates the scoop or bowl, provided on its rear end with an ordinary catch B. The axle is supported by wheels in the usual way and is cranked between the wheels, so as to provide it with the middle high portion O, to which a lever D is attached. The usual bail E has its side arms 1 respectively secured to one and the other of the sides of the middle high portion of the axle, one of said sides 2 being illustrated in Figs. 1 and 5. The bowl is suspended from the bail-arms by hangers or standards 3, and the ends of the bail-arms are connected by links 4 with swinging latch or looking devices Or, it being only necessary to show one hanger or standard 3 secured to one side of the bowl and to illustrate one link 4 connected with a locking device G at one side of the machine, as it is understood that like devices are also present for like purposes at the opposite side of the machine.

The locking devices G engage catch devices on the sides of the bowl when the latter is in working position, one of such catch devices 5 being shown in each of Figs. 1 and 5. The locking devices G are pivoted upon the draft device H, and u on the latter is arranged a latch device I for the purpose of engaging and locking the bail when the latter is swung forward to an extent to allow the bowl to dump, as in dumping-scrapers of this class. The lever D and the bail E are also secured together back of the rear end of the bowl, whereby the said bail and lever are in effect a single lever, which can be operated by taking hold of the handle end 6" of the lever D, the machine thus far described being of ordinary, common, and well-known construction.

The rear transverse portion 6, Figs. 2, 3, and 4, of the bail E is provided with a pair of rearwardly-extending arms K, formed by flat bars having their forward end portions 7 respectively bent laterally and outwardly and secured by bolts 8 to the rear transverse portion 6 of the bail. The bars K are trans-- 10, thereby rigidly securing together the lever-bar D and the rearwardly-projecting bailarms K, which are in turn rigidly bolted to the bail E, as hereinbefore described.

The latch L is hung so that it can engage catch B on the rear end of the-bowl when the latter is in carrying position, as best shown in Figs. 1' and 2. When the bowl is to be lowered, the latch L is disengaged by the operator from the catch B, so as to allow the lever comprising the bail E and the bar D to swing upwardly, as in Fig. 5. When said lever is depressed from the position shown in Fig.5, so as to raise the bowl, the latch L will at a proper moment engage and slide along and be deflected rearwardly by the upwardlyinclined rear face 11 of the catch B, and after the hook end of the latchL has passed below said incline 1.1 the-latch will swing forward, so as to engage under said catch. In order to thu's swing the latch forward, so as to cause it to engage under the catch B, I provide a coiled spring M, which is arranged upon a curved rod 12. The rod 12 is bent in the arc of a circle having its center at or about the axis of the bolt or pivot 9, on which the latch L is hung. Said curved rod 12 may therefore be properly termed a segment-rod.

The latch L is provided with an opening through which the forward end portion of the segment-rod 12 extends. The upper rear end of the segment-rod 12 is enlarged, as at 1 1, Fig. 2, so as to form a shoulder, the coiled spring M being confined between said shoulder and the latch L and supported upon the segment-rod, about which it coils. therefore unnecessary to attach either end of the spring M to'anything, as it is, in efiect, arranged between two abutments. The enlarged upper end portion of the segment-rod 12 is suitablyflattened and inserted between the bars or arms, K of the bail, and it is attached to said bars or arms by a bolt 15, upon which it is hung, and with this construction the bolt 15 preferably forms a pivot, upon which the segment-rod'12 is hung, thereby preventing stiffness in the operation of the latch, it being observed that if the segmentrod 12 is formed on the arc of a circle of which the latch-pivot 9. is not exactly the center the segment-rod 12 will yield so as to accommodate itself to the swing of the latch.

. The arms K on the bail sufi iciently steady the latch, and by placing the latch-pivot 9 about as shown in Fig. 2 the rear portion of the bail will maintain the latch upon the segment-rod 12 when the bail is raised, as in Fig. 5, and at the same time permit the latch L to be forced back upon the segment-rod against the spring M, soas to compress the latter when the lower portion of the'latch slides downwardly upon incline 11 of catch B on the bolt.' As the bars or arms K are rigidly bolted together and also rigidly secured to the bail, they constitute in effect a rear ex tension of the bail and also a lever, which is rigidly bolted to the lever-bar D.

When the latch L is in engagement with the catch on the rear end of the bowl, the spring on the curved rod 12 serves to hold the latch in engagement with the catch, as in Figs. 1 and 2. The latch is also provided with an ordinary handle L, which can be taken hold of by the operator, so as to swing the latch back to an extent to free it from the catch, as indicated by dotted lines. in Fig. 2. When the latch is thusswung back, the spring, which is thus confined between the latch and the lever, will be crowdedback upon its curved supporting-rod and thereby compressed; but upon releasing the latchhandle the spring. M will expand, and thereby force the latch forward by reason of such expansion to an extent to cause thelatch to engage under the catch on the bowl, it being also observed that when the hook portion of the latch slides down along the incline 11 of the catch the spring M will be compressed by the back swing of the latch until the lower end of the latch passes the lower end of said incline 11, after which the expansive action of the spring will swing the latch forward, and thereby cause it to engage under the catch.

The bail E is of ordinary common construction, and hence while I utilize the rear transverse portion 6 of the bail as a stop, which limits the forward swing of the latch, I have availed myself of an abutment present in a machine of this class. It is so that when the latch has been thrown for- The upper end L of thelatch is cam-shaped,

ward to the desired extent the cam will engage and bind against the rear transverse portion 6 of the bail, and thereby check further forward swing on the part of the latch when the lever is raised and the latch is free from the catch on the bowl.

What I claim as my invention is 1. In a wheeled dumping-scraper of the class described, a latch pivoted to and depending from the lever and adapted to engage the catch on the rear end of the bowl. when the latter is in raised carrying position; a curved rod attached to the lever in rear of the latch and extending forwardly to and through an opening with which the latch is provided at a point below its pivotal end; and a spring supported upon said curved rod and arranged between the latch and the lever, the latch being held in engagement with the catch by the expansion of such spring.

.. 2. In a wheeled dumping-scraper of the IIO class described, the lever comprising a pair of parallel bars secured to and extending back from the rear transverse portion of the bail; a pendent latch having its upper end pivoted between said parallel bars and adapted to engage a catch on the rear end of the bowl when the latter is in raised carrying position a curved rod having one end attached to the lever and its opposite end portion extending through an opening with which the latch is provided below its pivoted end; and a spring arranged on said curved rod between the latch and the lever; the upper end of the latch being arranged to engagethe rear transverse portion of thebail and thereby limit extent of forward swing on the part of the latch, and the latch being held in engagement with the catch by the expansion of the spring.

3. In a dumping wheeled scraper of the class described, a latch pivoted to and depending from the lever and adapted to engage a catch on the rear end of the bowl; a curved rod pivoted at one end to the lever and having its opposite end portion extended through an opening with which the latch is provided; and a spring arranged upon the curved rod and confined between the latch and a shoulder on the curved rod, the latch being held in engagement with the catch by the expansion of the spring.

4. In a dumping wheeled scraper of the class described, a latch pivoted to and depending from the lever and adapted to en- 1 gage a catch on the rear end of the bowl; a

curved rod attached to the lever and extending through an opening with which the latch is provided at a point below the latch-pivot; and a spring arranged on the curved rod and confined between the latch and the lever; said curved rod being substantially curved on the arc of a circle having the latch-pivot as its center, and the latch being held in engagement with the catch by the expansion of the spring.

5. In a wheeled dumping-scraper of the class described, a latch pivoted to and depending from the lever and adapted to engage a catch on the rear end of the bowl; a rod attached at one end to the lever, the latch having a shifting connection with the opposite end portion of such rod at a point below the oint at which said latch is pivoted to the ever; and a spring arranged upon said rod and between the latch and the lever and adapted to hold the latch in engagemen t with the catch.

6. In a wheeled dumping-scraper of the class described, a pendent latch having its upper end pivoted to the lever; a rod attached at one end to the lever and having its opposite end portion extending through an opening with which the latch is provided below its pivotal point; and a spring supported upon said rod and arranged to act against the latch, the upper end of the latch being camshaped and arran ed to engage the rear transverse portion 6 o the bail at a time suitable to limit the forward swing of the latch.

JOHN O. E. KROHN.

Witnesses:

CHARLES M. KAROH, WILLIAM C. POE. 

